To investigate the vibration characteristics of the aircraft-towing vehicle system under taxi-towing mode, a towing system dynamics model based on the Winkler contact model with a clamping mechanism-wheel clamping constraint was established on the basis of a general towing vehicle-aircraft system multibody dynamics model. The vibration characteristics of the aircraft-towing vehicle system under different conditions were analyzed, and the influence of towing force on the system''s vibration characteristics was studied. The results showed that there was a significant nonlinear correlation between the radial deformation of the aircraft''s nose landing gear wheel and the contact force, which had a significant impact on the contact behavior between the clamping mechanism and the wheel. During aircraft towing operations, it is necessary to pay close attention to the constrained deformation characteristics of the wheel. Under acceleration conditions, both the peak and mean values of the contact force increase approximately linearly with the increase in acceleration at the same target speed. High acceleration can exacerbate the system''s vibration level and reduce the stability of the clamping operation. Under constant acceleration conditions, the peak value of the contact force, vibration amplitude, and frequency all increase significantly with the increase in driving speed. The root mean square value of the vertical acceleration increases from 160.0262 mm/s2 to 203.0228 mm/s2, and the effect of road excitation becomes more significant at high speeds. During uniform speed driving, the vibration amplitude and frequency of the contact force continue to increase with the increase in speed, and the overall operational stability of the aircraft tends to decrease with the increase in speed.